Just returned from dealership.
The buzz/rattle appears to be gone for the moment and the door squeak as well. Fingers crossed.
Door issue is the limit strap mount inside the door. I was told they lubed it. I'm assuming I'll have to do this once in a while.
The Buzz I'm told was the serpentine belt. Really?..
That's what I'm told. They adjusted it and all's well. We'll see.